CBT3251
1-of-8 FET multiplexer/demultiplexer
Rev. 4 — 24 March 2021
Product data sheet
1. General description
The CBT3251 is a single-pole, 8-throw bus switch. The device features an output enable input (OE)
and three select inputs (S0, S1 and S2). When OE is LOW the switch is enabled and the select
inputs can be used to connect the A terminal to one of the eight B terminals.
2. Features and benefits
•
•
•
•
•
•
•
•
5 Ω switch connection between two ports
Direct interface with TTL levels
Overvoltage tolerant control inputs to 5.5 V
IOFF circuitry provides partial Power-down mode operation
Minimal propagation delay through the switch
Latch-up protection exceeds 100 mA per JEDEC standard JESD78 class II level A
ESD protection:
• HBM JESD22-A114E exceeds 2000 V
• MM JESD22-A115-A exceeds 200 V
• CDM JESD22-C101C exceeds 1000 V
Specified from -40 °C to +85 °C
3. Ordering information
Table 1. Ordering information
Type number
Temperature range
Package
Name
Description
Version
CBT3251D
-40 °C to +85 °C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
CBT3251PW
-40 °C to +85 °C
TSSOP16
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
4. Functional diagram
A
5
4
3
2
1
15
14
13
12
OE
S0
S1
S2
Fig. 1.
B1
B2
B3
B4
B5
B6
B7
B8
7
11
10
9
002aab820
Logic diagram
5. Pinning information
5.1. Pinning
CBT3251
B4
1
16 VCC
B3
2
15 B5
B2
3
14 B6
B1
4
13 B7
A
5
12 B8
n.c.
6
11 S0
OE
7
GND
8
CBT3251
10 S1
9
S2
B4
1
16 VCC
B3
2
15 B5
B2
3
14 B6
B1
4
13 B7
A
5
12 B8
n.c.
6
11 S0
OE
7
10 S1
GND
8
002aab816
Fig. 2.
Product data sheet
S2
002aab819
Pin configuration SOT109-1 (SO16)
CBT3251
9
Fig. 3.
Pin configuration SOT403-1 (TSSOP16)
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CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
5.2. Pin description
Table 2. Pin description
Symbol
Pin
Description
B1, B2, B3, B4, B5, B6, B7, B8
1, 2, 3, 4, 12, 13, 14, 15
B outputs/inputs
A
5
A input/output
n.c.
6
not connected
OE
7
output enable (active LOW)
S2, S1, S0
9, 10, 11
select control input
GND
8
ground (0 V)
VCC
16
positive supply voltage
6. Functional description
Table 3. Function selection
H = HIGH voltage level; L = LOW voltage level; X = Don’t care.
Inputs
Switch
OE
S2
S1
S0
L
L
L
L
A to B1
L
L
L
H
A to B2
L
L
H
L
A to B3
L
L
H
H
A to B4
L
H
L
L
A to B5
L
H
L
H
A to B6
L
H
H
L
A to B7
L
H
H
H
A to B8
H
X
X
X
switch off
7. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
Conditions
VCC
supply voltage
VI
input voltage
ISW
switch current
continuous current through each switch
IIK
input clamping current
VI < 0 V
Tstg
storage temperature
Ptot
total power dissipation
[1]
[1]
Tamb = -40 °C to +85 °C
Min
Max
Unit
-0.5
+7.0
V
-0.5
+7.0
V
-
128
mA
-50
-
mA
-65
+150
°C
-
500
mW
The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
CBT3251
Product data sheet
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CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
8. Recommended operating conditions
Table 5. Operating conditions
All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.
Symbol Parameter
Conditions
Min
Max
Unit
VCC
supply voltage
4.5
5.5
V
VIH
HIGH-level input voltage
2.0
-
V
VIL
LOW-level input voltage
-
0.8
V
Tamb
ambient temperature
-40
+85
°C
operating in free-air
9. Static characteristics
Table 6. Static characteristics
Symbol Parameter
Conditions
VIK
input clamping voltage
VCC = 4.5 V; II = -18 mA
Vpass
pass voltage
VI = VCC = 5.0 V; IO = -100 μA
II
input leakage current
ICC
Tamb = -40 °C to +85 °C.
Unit
Min
Typ
Max
-
-
-1.2
V
3.6
3.9
4.2
V
VCC = 5.5 V; VI = GND or 5.5 V
-
-
±1
μA
supply current
VCC = 5.5 V; IO = 0 mA; VI = VCC or GND
-
-
3
μA
ΔICC
additional supply current
per input; VCC = 5.5 V;
one input at 3.4 V,
other inputs at VCC or GND
[2]
-
-
2.5
mA
CI
input capacitance
control pins; VI = 3 V or 0 V
[1]
-
3.5
-
pF
Cio(off)
off-state input/output
capacitance
A port; VO = 3 V or 0 V; OE = VCC
[1]
-
17.5
-
pF
B port; VO = 3 V or 0 V; OE = VCC
[1]
-
4.0
-
pF
ON resistance
VCC = 4 V
[3]
-
5
20
Ω
RON
VI = 2.4 V; II = -15 mA
VCC = 4.5 V
[1]
[2]
[3]
[4]
[1]
[4]
[3]
VI = 0 V; II = 64 mA
[1]
-
5
7
Ω
VI = 0 V; II = 30 mA
[1]
-
5
7
Ω
VI = 2.4 V; II = -15 mA
[1]
-
10
15
Ω
Typical value is measured at VCC = 5 V; Tamb = 25 °C.
This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
Measured by the voltage drop between the A and the Bn terminals at the indicated current through the switch. The lowest voltage of
the two (A or Bn) terminals determines the ON resistance.
Typical value is measured at VCC = 4 V; Tamb = 25 °C.
CBT3251
Product data sheet
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CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
10. Dynamic characteristics
Table 7. Dynamic characteristics
VCC = 4.5 V to 5.5 V; for test circuit, see Fig. 6.
Symbol Parameter
Conditions
tpd
propagation delay
ten
enable time
tdis
[1]
[2]
disable time
Tamb = -40 °C to +85 °C
Min
Max
Unit
A to Bn or Bn to A; see Fig. 4
[1] [2]
-
0.25
ns
Sn to A; see Fig. 4
[1] [2]
1.5
5.5
ns
OE to A or Bn; see Fig. 5
[2]
1.5
5.6
ns
Sn to Bn; see Fig. 5
[2]
1.6
5.8
ns
OE to A or Bn; see Fig. 5
[2]
1.9
6.4
ns
Sn to Bn; see Fig. 5
[2]
2.3
6.2
ns
This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical ON
resistance of the switch and a load capacitance, when driven by an ideal voltage source (zero output impedance).
tPLH and tPHL are the same as tpd.
tPZL and tPZH are the same as ten.
tPLZ and tPHZ are the same as tdis.
10.1. Waveforms and test circuit
VI
input
VM
VM
0V
tPHL
tPLH
VOH
VM
output
VM
VOL
001aai367
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 4.
The input (A; Bn) to output (Bn; A) or input (Sn) to output (A) propagation delay times
VI
VM
OE, Sn input
VM
GND
tPZL
tPLZ
output
LOW-to-OFF
OFF-to-LOW
VCC
VM
VX
VOL
tPZH
tPHZ
VOH
output
HIGH-to-OFF
OFF-to-HIGH
VY
VM
GND
switch
enabled
switch
disabled
switch
enabled
001aan455
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 5.
Enable and disable times
CBT3251
Product data sheet
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CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
Table 8. Measurement points
Supply voltage
Input
Output
VCC
VI
VM
VM
VX
VY
4.5 V to 5.5 V
GND to 3.0 V
1.5 V
1.5 V
VOL + 0.3 V
VOH - 0.3 V
VI
negative
pulse
tW
90 %
VM
0V
VI
positive
pulse
0V
VM
10 %
tf
tr
tr
tf
90 %
VM
VM
10 %
tW
VEXT
VCC
G
VI
RL
VO
DUT
RT
CL
RL
001aae331
Test data is given in Table 9.
Definitions for test circuit:
RL = Load resistance.
CL = Load capacitance including jig and probe capacitance.
RT = Termination resistance should be equal to the output impedance Zo of the pulse generator.
VEXT = External voltage for measuring switching times.
Fig. 6.
Test circuit for measuring switching times
Table 9. Test data
Supply voltage Input
Load
VEXT
VCC
VI
tr, tf
CL
RL
tPLH, tPHL
tPLZ, tPZL
tPHZ, tPZH
4.5 V to 5.5 V
GND to 3.0 V
≤ 2.5 ns
50 pF
500 Ω
open
7.0 V
open
CBT3251
Product data sheet
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CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
11. Package outline
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
D
E
A
X
c
y
HE
v M A
Z
16
9
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
8
e
w M
bp
0
2.5
detail X
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
10.0
9.8
4.0
3.8
1.27
6.2
5.8
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
inches
0.069
0.010 0.057
0.004 0.049
0.01
0.019 0.0100 0.39
0.014 0.0075 0.38
0.16
0.15
0.05
0.039
0.016
0.028
0.020
0.01
0.01
0.004
0.028
0.012
0.244
0.041
0.228
θ
o
8
o
0
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
Fig. 7.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT109-1
076E07
MS-012
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
Package outline SOT109-1 (SO16)
CBT3251
Product data sheet
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CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
D
SOT403-1
E
A
X
c
y
HE
v M A
Z
9
16
Q
A2
pin 1 index
(A 3 )
A1
A
θ
Lp
1
L
8
detail X
w M
bp
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.30
0.19
0.2
0.1
5.1
4.9
4.5
4.3
0.65
6.6
6.2
1
0.75
0.50
0.4
0.3
0.2
0.13
0.1
0.40
0.06
8o
0o
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT403-1
Fig. 8.
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-18
MO-153
Package outline SOT403-1 (TSSOP16)
CBT3251
Product data sheet
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CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
12. Abbreviations
Table 10. Abbreviations
Acronym
Description
CDM
Charged Device Model
DUT
Device Under Test
ESD
ElectroStatic Discharge
FET
Field-Effect Transistor
HBM
Human Body Model
MM
Machine Model
TTL
Transistor-Transistor Logic
13. Revision history
Table 11. Revision history
Document ID
Release date
Data sheet status
Change notice Supersedes
CBT3251 v.4
20210324
Product data sheet
-
Modifications:
•
•
•
•
The format of this data sheet has been redesigned to comply with the identity
guidelines of Nexperia.
Legal texts have been adapted to the new company name where appropriate.
Section 1 and Section 2 updated.
Type number CBT3251DB (SOT338-1 / SSOP16) removed.
CBT3251 v.3
20160316
Modifications:
•
CBT3251 v.2
20130916
Modifications:
•
•
•
CBT3251 v.1
CBT3251
Product data sheet
CBT3251 v.3
Product data sheet
-
CBT3251 v.2
-
CBT3251 v.1
Type number CBT3251DS removed
Product data sheet
The format of this data sheet has been redesigned to comply with the new identity
guidelines of NXP Semiconductors.
Legal texts have been adapted to the new company name where appropriate.
Table 6 pass voltage modified.
20051221
Product data sheet
-
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 24 March 2021
-
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9 / 11
CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
14. Legal information
injury, death or severe property or environmental damage. Nexperia and its
suppliers accept no liability for inclusion and/or use of Nexperia products in
such equipment or applications and therefore such inclusion and/or use is at
the customer’s own risk.
Data sheet status
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
Document status
[1][2]
Product
status [3]
Definition
Objective [short]
data sheet
Development
This document contains data from
the objective specification for
product development.
Preliminary [short]
data sheet
Qualification
This document contains data from
the preliminary specification.
Product [short]
data sheet
Production
This document contains the product
specification.
[1]
[2]
[3]
Please consult the most recently issued document before initiating or
completing a design.
The term 'short data sheet' is explained in section "Definitions".
The product status of device(s) described in this document may have
changed since this document was published and may differ in case of
multiple devices. The latest product status information is available on
the internet at https://www.nexperia.com.
Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any representations or
warranties as to the accuracy or completeness of information included herein
and shall have no liability for the consequences of use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is
intended for quick reference only and should not be relied upon to contain
detailed and full information. For detailed and full information see the relevant
full data sheet, which is available on request via the local Nexperia sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
Nexperia and its customer, unless Nexperia and customer have explicitly
agreed otherwise in writing. In no event however, shall an agreement be
valid in which the Nexperia product is deemed to offer functions and qualities
beyond those described in the Product data sheet.
Disclaimers
Limited warranty and liability — Information in this document is believed
to be accurate and reliable. However, Nexperia does not give any
representations or warranties, expressed or implied, as to the accuracy
or completeness of such information and shall have no liability for the
consequences of use of such information. Nexperia takes no responsibility
for the content in this document if provided by an information source outside
of Nexperia.
In no event shall Nexperia be liable for any indirect, incidental, punitive,
special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal
or replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
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Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards customer
for the products described herein shall be limited in accordance with the
Terms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make changes
to information published in this document, including without limitation
specifications and product descriptions, at any time and without notice. This
document supersedes and replaces all information supplied prior to the
publication hereof.
Suitability for use — Nexperia products are not designed, authorized or
warranted to be suitable for use in life support, life-critical or safety-critical
systems or equipment, nor in applications where failure or malfunction
of an Nexperia product can reasonably be expected to result in personal
CBT3251
Product data sheet
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Nexperia makes no representation
or warranty that such applications will be suitable for the specified use
without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using Nexperia products, and Nexperia accepts no liability for
any assistance with applications or customer product design. It is customer’s
sole responsibility to determine whether the Nexperia product is suitable
and fit for the customer’s applications and products planned, as well as
for the planned application and use of customer’s third party customer(s).
Customers should provide appropriate design and operating safeguards to
minimize the risks associated with their applications and products.
Nexperia does not accept any liability related to any default, damage, costs
or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party
customer(s). Customer is responsible for doing all necessary testing for the
customer’s applications and products using Nexperia products in order to
avoid a default of the applications and the products or of the application or
use by customer’s third party customer(s). Nexperia does not accept any
liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those
given in the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Nexperia products are
sold subject to the general terms and conditions of commercial sale, as
published at http://www.nexperia.com/profile/terms, unless otherwise agreed
in a valid written individual agreement. In case an individual agreement is
concluded only the terms and conditions of the respective agreement shall
apply. Nexperia hereby expressly objects to applying the customer’s general
terms and conditions with regard to the purchase of Nexperia products by
customer.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
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Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia product is automotive qualified, the
product is not suitable for automotive use. It is neither qualified nor tested in
accordance with automotive testing or application requirements. Nexperia
accepts no liability for inclusion and/or use of non-automotive qualified
products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards,
customer (a) shall use the product without Nexperia’s warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
Nexperia’s specifications such use shall be solely at customer’s own risk,
and (c) customer fully indemnifies Nexperia for any liability, damages or failed
product claims resulting from customer design and use of the product for
automotive applications beyond Nexperia’s standard warranty and Nexperia’s
product specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
Trademarks
Notice: All referenced brands, product names, service names and
trademarks are the property of their respective owners.
All information provided in this document is subject to legal disclaimers.
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CBT3251
Nexperia
1-of-8 FET multiplexer/demultiplexer
Contents
1. General description...................................................... 1
2. Features and benefits.................................................. 1
3. Ordering information....................................................1
4. Functional diagram.......................................................2
5. Pinning information......................................................2
5.1. Pinning.........................................................................2
5.2. Pin description............................................................. 3
6. Functional description................................................. 3
7. Limiting values............................................................. 3
8. Recommended operating conditions..........................4
9. Static characteristics....................................................4
10. Dynamic characteristics............................................ 5
10.1. Waveforms and test circuit........................................ 5
11. Package outline.......................................................... 7
12. Abbreviations.............................................................. 9
13. Revision history..........................................................9
14. Legal information......................................................10
©
Nexperia B.V. 2021. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release: 24 March 2021
CBT3251
Product data sheet
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